Journal
OPTICS EXPRESS
Volume 18, Issue 5, Pages 5350-5355Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.005350
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Funding
- Belgian Science Policy Office [IAP VI/10, IAP VI/11]
- FWO-Vlaanderen [G011410N]
- VUB
- Department of Energy (Basic Energy Sciences) [DE-AC02-07CH11358]
- Belgian American Educational Foundation
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According to general relativity, the frequency of electromagnetic radiation is altered by the expansion of the universe. This effect-commonly referred to as the cosmological redshift-is of utmost importance for observations in cosmology. Here we show that this redshift can be reproduced on a much smaller scale using an optical analogue inside a dielectric metamaterial with time-dependent material parameters. To this aim, we apply the framework of transformation optics to the Robertson-Walker metric. We demonstrate theoretically how perfect redshifting or blueshifting of an electromagnetic wave can be achieved without the creation of sidebands with a device of finite length. (C) 2010 Optical Society of America
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